Class – XII
Subject : Biology 1st Paper
Time : 3 hrs. Marks. 75
1. a) What is classification? Define different types of classification. 1+4 =5
b) Classify Margulis classification. 10
Or a) Write down the characteristics kingdom Monera. 4
b) Write down the characteristics of Gymnospermae. 4
c) Draw Penicillium. 3
d) Write the name of fungi of the disease " Brown leaf spot" of rice. Give the structure
of that fungi. 1+3 =4
2. a) Discuss about dark phase of photosynthesis. 10
b) Draw the transverse section of a dicot root 5
Or a) Discuss about prophase -1 of Meosis-1. 10
b) Write down the in complete oxidation of pyruvic acid. 10
3. a) What is plant succession? Describe about hydrosere. 1+4=5
b) Discuss on N2 -cycle. 4
c) Write down the exceptions of Medel's 1st law. 6
Or, a) Give a brief description of recombinant DNA Technology. 10
b) Write down the scientific name of the following plants__________. 5
(i) Tobacco (ii) Chilli (iii) Gram (iv) Cabbage (v) Asparagus.
Group - B
4. Give the structure of Saceharomyces. 5
Or What is enzyme? Write down the characteristics of enzyme. 1 +4 =5
5. Draw the longitudinal section of an ovule. 5
Or Write down following definatians---
(i) Osmosis (ii) Vascular bandle (iii) Alternation of generation (iv) Stomatal
transpiration. (v) Triple fusion.
6. Give a short description on 9:7 ratio.
Or What is Ecological pyramid? Describe about a pyramid of number. 1+4 =5
7. Write down the internal differences between root & stem. 5
Or, Write down the differences between angiospermae & Gymnospermae.
8. Classify different monosaccharide. 5
Or, classify different conjugated protein.
9. Give the physical structure of DNA. 5
Or, Discuss about critical photoperiod.